Storage battery.



21 0; 813,?30. PATENTED FEB. 27, 1906. A. MULLER.

STORAGE BATTERY. APPLICATION FILED JULY 30,1904.

2 SHEETS-SHEET 1.

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AnoLrni tLtEaI or BERLIN, GERMANY.

I sr'oaaee sari-ear.

I all whom, it may concern:

Be it known that L'ADOLPH Mi'JLLER, a subject of the German- Emperor, and a resident of Berlin, Germany, have invented certain new and useful Im rovements in Storage Batteries, of-whioh t efollowing is a specification.

Tlates which consist of finely-perforated metal sheet or fine metal gauze inclosing blocks of active material all suffer from the disadvantage that, on the one hand, the

' sheets of gauze are strongly forced apart by the expansion of the active mass, caused by the electrolytic action, thusmakin the p ates thicker, and, on the other han the Whole rid'is very unstable unlessa very strong ame is provided, in which case the weight of the grid is disproportionately increased. It has been attem ted to overcome this difficulty by pus 'ng stays or strips between the plates after assembling, thus pressing the two erforated covers of each plate together. his not only has the a disadvantage of making the construction of ed, but by t1 the strips are disarranged, so that it is impostaken through another portion of the pi .Figs. 5 and 6 are respectively plan a the plates more complicated, but also makes it very diflicult to change single plates later, since not onl has the active material expandlie removing of a single plate all sible to insert a new p ate in place of the old. The present invention avoids this disadvantage, since the sheets inclosing the active material are sofclosely bound together at frequent intervalsthat the strength of the joints is equal to the strength of the sheets.

The invention, stated in general terms, comprises the improvements to be presently described and finally claimed.

The. nature, characteristic features, and

S00 e of the invention will be more fully un erstood from the following description, taken in connection with the accompanying drawings, forming part hereof, and in Which Figure 1 is a view illustrating a side view ofaj portion of the'xplate and indicating that the plate-is the same throughout. Fig. 2 is a sectional view drawn to an enlarged scale and taken in a vertical direction through Fig. 1. Fig. 3-is a sectional view of the edge of the plate drawn to a' reduced scale and taken in a generally horizontal direction with respect to Fig. 1. Fig. 4 is a similar view sectional view illustrating a modification of the invention. Fig. 7 is a perspective view Specification of Letters Patent. Application filed July 30, 1904. Serial No. 218,816.

PatentedFeb. 2?,1906.

' of a blank from which one of the plate-covers is made. Figs. 8 and 9 are sectional views taken at right angles in respect to each other andillustrating means for making the plate, and Figs. 10 and 11 are similar views showing diiierent positions of the means illustrated in Figs. 8 and 9. r

The plate or electrode comprises a support or envelop consisting of two perforated covers 1 and 2, within which are contained cakes 3 of activematerial or material to become active. These covers at their margins are held together by U or similarlyshaped reinforcing strips 4, Figs. 3 and 4. At suitable intervals throughout the covers there are loops, through which are inserted pins 5, which may be of material that is not acted upon by the electrolyte. These pins serve not only to firmly bind the two covers together, thus retaining the active material properly, but they also serve to stiffen the plates or impart rigidity to them. The ends of these pins may be inclosed bythe strip 4,

as shown in Fig. 3. The loops may be va- As shown in Fig. 2, the loops 6 and 7 are formed one from each cover-plate and are bent. in pairs alternately backward and forward, whereas in Figs. 5 and 6 the loops 8 are bent back from one cover 9 through perforations 10 in the other cover 11. In either event there are formed pockets or corrugations which contain the active material.

For the sake of description an explanation will now be given of one way of making the plate shown in Figs. 1 to 4. The blank shown in Fig. 7 is first made, and two such blanks are placed between the dies 12 and 13. (Shown in Figs. 8 to 11.) These dies are arranged in a suitable press and are provided with movable formers 14 and 15, respectively provided with projections arranged opposite spaces. The dies 12 and 13 and formers 1 1 and 15 are after the cakes of material 3 have been placed in the pockets or corrugations of the covers pressed together, thus bringing the coverwlates into tight contact with the cakes and also bending back the loops 6 and 7 1n the manner described. The formers or plungers 14 and 15 are then withdrawn, as

shown in Fig. 11, while" the dies 12 and 13 held the covers firmly to the active material. reupon the pins 5 are inserted through loops. The strips 4 are then applied to the edges of the plate in the manner described.

To make the plate shown in Figs. 5 and. 6,

to which the invention relates that modifications may be made in detail without departing from the s irit thereof. Hence the invention is not imited further than the prior state of the art may require; but,

Having thus described the nature and objects of my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A battery plate-support consisting of perforated covers provided with lateral loops, and having pins inserted through the loops, the relation of the loops being such that the pins lock the covers together, substantially as described. I

2. A battery plate-support consisting of .perforated covers provided respectively at intervals with loops struck up in the same direction, and having pins inserted throu h the loops and the intervals between the loops, the relation of the loo s and intervals being such that the pins locli the covers together, substantially as described.

3. A battery plate-sup ort consisting of perforated covers provided with lateral loops and having pins inserted through them, and U-shaped strips clamping the-edges of the covers and the ends of the pins, the relation of the loops being such that the pins lock the covers together, substantially as described.

4. A battery-plate consisting of cakes of active material, or material adapted to become active, a support or envelo consisting of two perforated covers provide with loops, pins engaging the loops and locking the covers together, and U-shaped marginal strips, substantially as described.

5. A battery-plate consisting of corru ated perforated cover-plates provided with aterally-extending loops, pins engaging the loops and locking the covers together, cakes of active material in the corrugations, and means for clamping the edges of the covers, substantially as described.

Signed at New York city, in the county of New York and State of New York, this 22d day of July, A. D. 1904.

ADOLPH MULLER.

Witnesses:

. MINNIE WOODLE,

AUGUSTUS B. STOUGHTON. 

